Flex is an open source program designed to automatically and quickly generate scanners, also known as tokenizers, which recognize lexical patterns in text. Flex is an acronym that stands for fast lexical analyzer generator... (Continued) Continue Reading

Learn how to set up the ModSecurity Web application firewall on Red Hat Enterprise Linux 5.4 and Apache Web server 2.2.x. This firewall monitors access to Web servers to ensure that requests are valid and not malicious. Continue Reading

An understanding of a Preboot Execution Environment (PXE) server can be helpful when installing an operating system. A systems and networking expert explains how to use a PXE server to install CentOS 5.2 remotely in this tip. Continue Reading